CN1265405C - Inductive translator composed of two spools with respective cores - Google Patents

Abstract

The invention relates to an inductive translator composed of two spools (1, 2) with respective cores (3, 4), said cores (3, 4) being capable of moving in relation to each other. The translator comprises two integrated systems for a simultaneous transmission of data and/or energy as well as the position of the two cores (3, 4) relatively to each other. The transmission of data and/or energy finally takes place through induction and the determination of the relative position of the two cores (3, 4) is carried out by means of a measurement of the magnetic field prevailing between the two spools (1, 2).

Description

Inductive transformer consisting of two coils each with a core

technical field

The invention relates to an inductive transformer consisting of two coils each with a core.

Background technique

Such inductive transducers are used to transform data and/or energy between two components that move relative to each other; for example in the form of rotary transducers in rotating components (such as the steering wheel of a motor vehicle), or in the form of linear transducers in Transforming data and/or energy on components that move linearly with respect to each other. For this purpose, the converter consists of two coils each with a core, wherein the two cores are displaceable relative to each other. The data and/or energy conversion takes place by means of induction (transformer principle).

It is also known to determine the relative position of two parts which are movable relative to each other by means of magnetic testing methods.

If both data and/or energy conversion is to be achieved and the mutual position of two components has to be determined, two separate devices have been used so far, one for data and/or energy conversion and the other for determining relative position. This results in increased space requirements, multiple components and high expense.

Contents of the invention

The object of the invention is to propose an inductive transducer which is very small and compact. Wherein two separate devices with different functions are integrated into a single device, thereby reducing the number of individual components. In the case of the same function, the cost is saved.

The technical solution to the above object is an inductive transducer comprising: two coils, each with a core, wherein the two cores are movable relative to each other, and the transducer is capable of simultaneously transforming data and/or energy and determining the mutual position of said two cores, wherein the transformation of data and/or energy is achieved by means of induction induced between the coil and the cores; a sensor, wherein the sensor is sensitive to magnetic fields, said two The mutual position of the two cores is determined by the sensor measuring the magnetic field present between the two coils.

Description of drawings

The figures illustrate two embodiments of the invention and are described in detail in the following description. which shows:

Figure 1 A cross-sectional view through an inductive transformer in the form of a rotary transformer,

Figure 2 An inductive transformer in the form of a linear transformer,

Fig. 3 is a sectional view according to the direction A-A of Fig. 2 .

Detailed ways

Figure 1 depicts a first embodiment of the invention. In this embodiment, the inductive transducer is a rotary transducer. The rotary transformer consists of two coils 1 , 2 each with a ring-shaped core 3 , 4 , one of which—the core 3 in the exemplary embodiment—is mounted rotatably about an axis Z. The cross-sections of the two cores 3, 4 may be L-shaped. The side of the L-shaped core 3 facing the core 4 has a bevel 5 , here a bevel. On the opposite side of the slope, a magnetic sensor 6 is mounted on the core 4, and the magnetic sensor 6 may be a Hall sensor, a magnetoresistive sensor or the like.

The air gap 7 between the two cores 3 and 4 changes when the core 3 rotates around the axis Z due to the beveled surface 5 forming the slope. This change in the air gap 7 causes a change in the magnetic flux, which can be measured with the magnetic field sensor 6 . Therein, the measured magnetic flux has a direct relationship to the rotation angle between the two cores 3 and 4 .

By means of this configuration, not only data and/or energy can be transformed, but also the relative position of the two cores 3 and 4 can be determined.

Figures 2 and 3 show another embodiment in which the inductive converter is a linear converter. For example, in detachable seats of motor vehicles, such linear converters can be used to transform the signals of control elements and side airbags or to transform the energy for seat heating or servo motors, and can additionally measure the seat during automatic seat adjustment. s position.

The linear converters of Figures 2 and 3 operate on the same principle as the rotary converter of Figure 1 . The linear converter likewise has two coils 1 , 2 each with a core 3 , 4 , wherein the two cores 3 , 4 may have a U-shaped cross section. However, they can also be L-shaped. The coil 2 can move together with its core 3 in the direction of arrow X in FIG. 2 . On its side facing the core 3 , the core 4 has a bevel 5 which, like the exemplary embodiment of FIG. 1 , is a bevel. Wherein, the slope is formed on at least one free side of the U-shape. On the core 3 on the opposite side of the slope, a sensor 6 is arranged on at least one free edge of the U-shape. A sensor 6 can also be mounted on both free sides of the U-shaped core 3 if both free sides of the U-shaped core 4 have bevels 5 .

The air gap 7 between the two cores 3 and 4 is changed by the movement of the core 3 in the direction of the arrow X in FIG. 2 . This results in a change in the magnetic flux, which can be measured by the sensor 6 . Therein, the measured magnetic flux has a direct relationship to the mutual position of the two cores 3 and 4 .

In these two embodiments, only the coil 1 on the core 4 carries current, while the coil 2 on the core 3 does not carry current, and only the coil 1 on the core 3 is used for induction.

The above-described embodiments according to the present invention are for the purpose of explanation only and not for the purpose of limiting the present invention. There may be various changes and modifications and equivalents within the scope of the present invention without departing from the scope of the present invention.

Claims (12)

1. An inductive transducer comprising: two coils (1, 2), each with a core, wherein said two cores (3, 4) are movable relative to each other, said transducer is capable of simultaneously transforming data and/or energy and determining said two The mutual position of two iron cores (3, 4), wherein the transformation of data and/or energy is realized by means of the induction caused between the coils (1, 2) and the iron cores (3, 4); A sensor, wherein the sensor is sensitive to a magnetic field, the mutual position of the two cores (3, 4) is determined by the sensor measuring the magnetic field present between the two coils (1, 2). 2. Inductive transducer according to claim 1, characterized in that at least one core (3, 4) has a slope which causes a change in the magnetic flux at the magnetosensitive sensor (6). 3. Inductive transformer according to claim 2, characterized in that the slope of one core (3, 4) faces the other core (3, 4). 4. The inductive transducer according to claim 2, characterized in that the sensor (6) is arranged opposite to the slope. 5. Inductive converter according to one of claims 1 to 4, characterized in that the sensor (6) is a Hall sensor or a magnetoresistive sensor. 6. Inductive transducer according to one of claims 1 to 4, characterized in that the sensor (6) is arranged in an air gap (7) between the two cores (3, 4). 7. Inductive transducer according to one of claims 2 to 4, characterized in that the sensor (6) is arranged on one core (3, 4) and the ramp is arranged on the other core (3, 4) superior. 8. Inductive transducer according to one of claims 2 to 4, characterized in that the sensor (6) and the ramp are arranged on the same core (3, 4). 9. Inductive transformer according to one of claims 1 to 4, characterized in that the movement of the two cores (3, 4) relative to each other is a rotational movement. 10. Inductive transformer according to one of claims 1 to 4, characterized in that the movement of the two cores (3, 4) relative to each other is a linear movement. 11. Inductive transformer according to one of claims 2 to 4, characterized in that the cross-section of the core (3, 4) is L-shaped, and that the bevel is formed on one side of the L-shape. 12. The inductive transformer according to one of claims 2 to 4, characterized in that the core (3, 4) has a U-shaped cross-section and the bevel is formed on at least one free edge of the U-shape .